Electronic and topological properties of the van der Waals layered superconductor PtTe

Abstract

We report the crystal growth and structural and electronic properties of superconducting, van der Waals layered PtTe. Easily cleavable crystals with a plate-like morphology consistent with the layered structure were grown from a platinum rich flux. A consistent determination of $T_c=0.57$ K is made from the onset of diamagnetism, the zero of resistivity, and the midpoint of the heat capacity jump. The observed behavior is consistent with type-II superconductivity, with upper critical field at $T=0$ estimated using the Werthamer-Helfand-Hohenberg theory to be 143 and 65 Oe for fields out of and in the plane, respectively. The heat capacity discontinuity is close to the weak coupling BCS value. Density functional theory calculations and analysis of the electronic structure finds that PtTe is a topological semimetal with numerous surface states, but suggests the superconducting state itself may be topologically trivial. Angle resolved photoemission spectroscopy reveals a normal-state Fermi surface in remarkable agreement with theory, and confirms the overall topological nature of the material by experimental identification of the surface bands. Together, these findings identify PtTe as an interesting example of a cleavable, topological, and superconducting material.

References in corpus (32)

• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Topological Insulators with Inversion Symmetry
• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• WannierTools: An open-source software package for novel topological materials
• Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides
• Wannier90 as a community code: new features and applications
• Topological quantum chemistry
• Two-Dimensional Itinerant Ising Ferromagnetism in Atomically thin Fe3GeTe2
• First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
• The (High Quality) Topological Materials In The World
• Intrinsic magnetic topological insulators in van der Waals layered MnBi${}_2$Te${}_4$-family materials
• Band structure diagram paths based on crystallography
• Superconductivity in Weyl Semimetal Candidate MoTe2
• Observation of topological superconductivity on the surface of an iron-based superconductor
• Edge conduction in monolayer WTe2
• Van der Waals heterostructures for spintronics and opto-spintronics
• Bulk Fermi surface coexistence with Dirac surface state in Bi${}_2$Se${}_3$: a comparison of photoemission and Shubnikov-de Haas measurements
• Lorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe${}_2$
• Pressure-driven dome-shaped superconductivity and electronic structural evolution in tungsten ditelluride
• FermiSurfer: Fermi-surface viewer providing multiple representation schemes
• Irvsp: to obtain irreducible representations of electronic states in the VASP
• Micro-Raman Spectroscopy of Mechanically Exfoliated Few-Quintuple Layers of Bi(2)Te(3), Bi(2)Se(3) and Sb(2)Te(3) Materials
• Use of frit-disc crucibles for routine and exploratory solution growth of single crystalline samples
• Experimental Realization of Type-II Dirac Fermions in PdTe${}_2$ Superconductor
• A precise method for visualizing dispersive features in image plots
• The coherence-incoherence crossover and the mass-renormalization puzzles in Sr2RuO4
• Classical magnetotransport of inhomogeneous conductors
• All Topological Bands of All Nonmagnetic Stoichiometric Materials
• Type I superconductivity in the Dirac semimetal PdTe2
• Linear magnetoresistance in metals: guiding center diffusion in a smooth random potential
• Non-saturating large magnetoresistance in semimetals
• High Resolution Angle Resolved Photoemission with Tabletop 11eV Laser